Category: Electrical (page 1 of 3)

VEX Sensors: Accelerometer

The VEX accelerometer component’s usefulness in competition seems to be limited to a tilt sensor or an unexpected-stop sensor. Using it for position calculation involves double-integration, which introduces noise.

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Extension Wires & Motor Controllers

Motor controllers need to be plugged in close to the cortex, and 2-wire extensions should be used to reach motors far away. You can use 3-wire extension cables in place of 2-wire extensions if needed.

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Power Expander: 2 Batteries Are Better than One! (Updated)

Did you know you’re allowed to use 2 batteries on your VEX competition robot? Learn more to improve your robot’s performance!

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The 9V Backup Battery

New coaches: don’t be caught flat-footed at your first tournament. Understand what the required 9V backup battery is all about, *well in advance* of your competition (in time for you to find/buy one).

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VEX Sensors: Getting Started with the Gyro

The VEX yaw rate gyro sensor has exceedingly little official documentation or instructions. I have tried to collect all of the general information I can find from the VEX Forum along with my personal experience and put it here in one place. [This post does not include specific programming instruction.]

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VEX Sensors: Line Tracker

The VEX line tracker is used to follow the white tape lines on a competition field during autonomous. This post covers it all: how they work, how to install them on your robot, testing, programming (including easyC), resources, and troubleshooting.

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VEX Sensors: Ultrasonic Range Finder

The ultrasonic sensor uses sound waves to calculate the distance to an object in front of the sensor. Use it in autonomous, driver control, & pre-auton/initialize too!

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VEX Sensors: Shaft Encoders

Shaft encoders are another of VEX’s most reliable—and widely used—sensors. Encoders are used (primarily in autonomous) to measure how far a robot has travelled, and to keep the robot moving in a straight line.

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VEX Sensors: Potentiometer

This is the second of a series of posts that examines each VEX sensor in turn. The aim of this series is to help teams that are new to using sensors have an idea of what is available and what they might like to use on their own robots. And since this post has gotten […]

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VEX Sensors: Bumper & Limit Switches

Bumper & limit switches are reliable and widely used digital sensors. Here’s how they work and how you can use them on your robot.

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